Method for the determination of soil total nitrogen semi - micro kjeldahl method 土壤全氮測定法半微量開氏法
Analysis of ammoniacal nitrogen 氨態(tài)氮測定法
Standard test methods for instrumental determination of carbon , hydrogen , and nitrogen in petroleum products and lubricants 石油產(chǎn)品及潤滑劑中碳?xì)?font color="#cc0033">氮測定法
Standard test method for trace nitrogen in liquid petroleum hydrocarbons by syringe inlet oxidative combustion and chemiluminescence detection 液態(tài)石油烴中痕量氮測定法